Aliens from a previously undiscovered tenth planter from the Sun aproach Earth for the first time in two milinia.

Long Synopsis:

A geologist discovers a patern of catastrophe bands in the earth geologic record. When he realizes that were due for another major band and the apearance of a previously unseen dark planet enters the endges of the solar shystem, the world prepares. Have we evolved enough in the past two thousand years to survive the encounter, or will the infamus dark cloud swallow civilization yet again?